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CAD · head to head

FreeCAD vs Ray

FreeCAD logo

FreeCAD

CAD

Open-source parametric 3D CAD modeler

From
Free
Rated
-
Full reviewWebsite
Ray logo

Ray

Machine Learning

Scale AI and Python applications

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: FreeCAD no pricing published; product is completely free and open-source; Ray windows support is beta and multi node Ray clusters are untested on Windows
  • They diverge on capability: FreeCAD covers Parametric modeling, Ray covers Distributed computing.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which FreeCAD and Ray actually diverge.

Attributes where FreeCAD and Ray differ
AttributeFreeCADRay
Pricing modelopen-sourcefreemium
PlatformsWindows, macOS, LinuxLinux, Mac, Windows
CategoryCADMachine Learning
Founded20022019

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in FreeCAD

  • Parametric modeling
  • Part design
  • Assembly
  • Drafting
  • FEM simulation
  • Path/CAM
  • Architecture
  • BIM

Only in Ray

  • Distributed computing
  • Ray Train
  • Ray Tune
  • RLlib
  • Ray Serve
  • PyTorch
  • TensorFlow
  • Hugging Face

Both cover

  • Windows support
  • Linux support

What people use each for

The jobs each tool is most often brought in to do.

FreeCAD

  • Mechanical engineering designnot Ray
  • Architectural modellingnot Ray
  • Product design and prototypingnot Ray
  • CAM/CNC path generationnot Ray

Ray

  • Distributed AI model training and servingnot FreeCAD
  • Large-scale data processingnot FreeCAD
  • Reinforcement learning workloadsnot FreeCAD
  • ML inference servingnot FreeCAD

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

FreeCAD

  • No pricing published; product is completely free and open-source
  • Donations are optional and voluntary for project support

Ray

  • Windows support is beta and multi node Ray clusters are untested on Windows
  • Windows lacks copy on write forking, which raises memory requirements, and Ray code assumes UNIX filenames
  • Multi node clusters are untested on Apple Silicon Macs
  • The Java API is experimental and community supported only, and requires matching Java and Python versions
  • Python 3.13 support is beta

Pricing, plan by plan

FreeCAD

Free

No published plan breakdown. See the FreeCAD review.

Ray

Free
  • Open SourceFree
    • Full Ray framework
    • All libraries
    • Community support
  • Anyscale PlatformFree
    • Managed infrastructure
    • Enterprise support
    • SLAs

Which should you pick?

Choose FreeCAD if

  • You need parametric modeling.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want part design.
FreeCAD review

Choose Ray if

  • You need distributed computing.
  • You want to start without paying.
  • You work on Linux, Mac, Windows.
  • You also want ray train.
Ray review

Questions people ask

Is FreeCAD or Ray better?
Neither clearly leads. FreeCAD starts at Free and Ray at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, FreeCAD or Ray?
FreeCAD starts at Free and Ray at Free.
Does FreeCAD or Ray run on more platforms?
FreeCAD runs on Windows, macOS, Linux. Ray runs on Linux, Mac, Windows.
Can I use FreeCAD for free?
Both have a free tier, so you can try either at no cost before committing.
What is FreeCAD best used for?
FreeCAD is most often used for mechanical engineering design, architectural modelling, product design and prototyping, cam/cnc path generation. Of those, mechanical engineering design and architectural modelling are not what Ray is typically brought in for.
What can FreeCAD do that Ray cannot?
FreeCAD covers Parametric modeling, Part design, Assembly, Drafting. Ray covers Distributed computing, Ray Train, Ray Tune, RLlib. Both handle Windows support, Linux support.

Answered from the vendors’ own pages

FreeCAD: How much does FreeCAD cost?

FreeCAD is completely free with no licensing fees, vendor lock-in, sign-up requirements, paywalls, or restrictions. The software is open-source and available for anyone to use and adapt.

Source
Ray: Is Ray free?

Yes. Ray is free and open source software with over 34,800 GitHub stars and 1,000+ contributors. Users can download and use the Ray framework at no cost.

Source
FreeCAD: Does FreeCAD offer optional support or sponsorship?

FreeCAD accepts voluntary donations to support the project. Sponsorship tiers range from $1 per month (Normal Sponsor) to $200 per month (Gold Sponsor), with different visibility levels. One-time donations of any amount are also accepted.

Source
Ray: Is there a paid option for Ray?

Yes. Anyscale, the managed platform built by Ray's creators, offers paid tiers with enterprise features like governance and advanced tooling. Specific Anyscale pricing details are not listed on the Ray website.

Source
Ray: Can I try Ray with credits?

Yes. New users can try Ray with $100 credit on Anyscale's managed platform to explore the service.

Source
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